Apparatus for introducing steam into centrifugal machines.



No. 744,503. PATENTED NOV.'17, 1903'. 4 G. DENTSGH. A

APPARATUS FOR IINTRODUOINGISTBAM INTO. GENT RIFUGAL MACHINES.

APPLIOATIOH I'ILED AUG. 28, R103.

2 SHEETS-SHEET 1 NO MODEL.

- frweniar. @kaZ r/y flfzezci.

W 1M. h,

THE NORRIS PETERS c9, mnmumovfmswmmou4 n. c,

, A No. 744,503,

Patented November 1'7, 1901 3.

PATENT OFFICE.

e srAv'DfEuTs'oH, OF VIE N NA, AUS RIA-HUNGARY.

APPARATUS Foe INTRODUCING-STEAM IN T CENT RlFUGAL MACHINES.

sPEorFIoArrIoN raisin part of Letters Patent No. 744,503, dated November17, 1903, Application filed August 28,1903: Serial No. 171,053.(Nomodelu) To all whom, it inay cm'tlcern: 1

Be it known that I, GUSTAV DENTSOH, a subject of the Emperor ofAustria-Hungary, residing at Vienna, in the Province of Lower Austriaand Empire of Austria-Hungary,

have invented a new and useful Improvement 1 in Apparatus forIntroducing Steam into Centrifugal Machines for Whitening Sugar,of whichthe following is a specification.

' My invention relates to apparatus by means of which steam isintroduced into the baskets of centrifugal machines for separating themolasses from the sugar crystals leaving the vacuum-pan. As is wellknown,itis desirable that steam used for this purpose should beperfectly dry, so as to render the molasses more fluid rather by heatingit than by diluti-ng it, as otherwise too much sugar would be dissolved.

My invention therefore has for its main object to provide apparatus bymeans of which perfectly-dry steam can be obtained with certainty.

The special arrangement and construction of my apparatus is based uponthe fact that dry steam is by wiredrawing it converted into steam'ofless pressure and lower temperature, in which, however, the loss ofpressure is more considerable than the loss of temperature, so that theresulting steam isof higher temperature than would correspond to itspressure and that consequently this steam is superheated steam, which iscapable to spend a certain amount of heat without undergoingcondensation.

. According to my invention a steam-drier combined with awiredrawing-valve is interposed between the steam-main and thesteamspraying nozzle arranged in the basket of the centrifugal machine,and this nozzleis'also adapted to wiredraw the steam.

The invention also comprises certain features of the piping carrying'the nozzle and the bluing device interposed" into the said piping.

In the annexed two sheets of drawings,

Figure 1is' a. sectional elevation of a centrifugal machine providedwith my improved apparatus for introducing steam. Fig. 2 is a top Viewof the said centrifugal and apparatus.

- Fig. 3 is a sectional elevation of the combined steam-drier andwiredrawing-valve. Fig. 4:

is a'section on line4 4 of Fig., 3. Fig. 5 is a top view of the joint ofthe piping carrying the steam-spraying nozzle. Fig. 6 is a section online 6 6 of Fig. 5. Fig. 7 is an elevation of the bluing deviceinterposed into the pipin g carrying the steam-spraying nozzle. Fig.

8 is a section on line 8 8 of Fig. '7. Fig. 9 isa sectional elevation ofthe steam-spraying noz- Z10, and Fig. 10 is a cross-section of the same'steam spraying nozzle 8. The pipe 9 extends from a cook 10 at thebottom of the casing 2 into the casing 11 of the centrifugal in order todischarge into the same a mixture of con densed water and steam.

In the construction of the combined steam drier and wiredrawer it wasmade a point, as far as possible, to utilize the heat of the live steamand to avoid by all means held out by technics the losses of heat byconduction and by radiation.

It will be seen from Fig. 3 that the casing 2 2 of the combinedsteam-drier and wiredrawing-valve is composed of two parts 2 and 2' inorder to admit of the inner parts being inserted; but owing' to thelarge surfaces of contact at the-joint the casing behaves like a solidpiece under the point of view of conduction of heat. Moreover, it isprovided with an insulating-coating; The lower part 2 of the casing isprovided with a neck 12, by means of which the casing is connected withthe steam-pipe 1. As shown in Fig. 1, the shell of the cook 10 is castin one piece with the bottom of part 2 of the casing 2 2. However, thesaid bottom may also be provided instead with a screw-threaded hole 13(shown in Fig. 3) and destined to have a neck of the said cock shellscrewed into it. Into this threaded seat formed in the part 2 of theeasing, while the outer surface of the hollow cylinder 14 carries abroad thin helical rib or screw-thread 15, tightly fitting into the part2 of the casing. By the said helical rib 15 a helical passage is formed,the lower portions of which communicate through slots 16 with the innerhollow space of the cylinder 14. The steam flowing in through the neck12 rushes through this helical passage, and thereby has a whirlingmovement imparted to it, in consequence of which the particles of waterwhich it contains are by the centrifugal force thrown against the outersides of the passage. The dry steam passes through the slots 16 andrises within the hollow cylinder 14, while the separated water flowsdownward along the helical rib or partition 15 and gathers in thelowermost portion of the casing. Thence it escapes through thepartlyopened cook 10 with a certain quantity of steam into the casing 11of the centrifugal.

Above the top flange of the hollow cylinder 14 a disk 17 is tightlyscrewed into the part 2 of the casing 2 2', the said disk 17 beingpierced by radial slots and serving as a valveface for a disk-shapedvalve 18, provided with corresponding slots and kept in position by theupper part 2 of the casing. The circular valve 18 is provided with astem 19, which projects to the outside through a stuffing-box 20 andcarries a handle 21, by means of which the valve 18 can be turned uponits valveface 17, the movement being limited by a stop-pin 22, screwedinto the valve-face and projecting into a recess 23 of the edge of thevalve 18. The lower portion of the said valvestem 19 is made solid andprovided with radial ribs, which promote the exchange of caloric betweenthe highly-heated valve-stem and the surrounding wiredrawn steam oflower temperature. The top portion 24 of the said valve-stem is madetubular in order to admit of the insertion of a thermometer.

When the apparatus is working, the valve 18 is so adjusted upon itsvalve-face 17 as more or less to narrow the slots through which the drysteam is obliged to flow, and thereby the said steam is withdrawn,andconsequently converted into superheated steam of less pres sure andlower temperature. A cock 25, having a neck of its shell screwed into ascrewthreaded hole 26 of the upper part 2' of the casing of the steam-drier and wiredrawer near the exit-neck 27 of the said casing, admitsof samples of steam. being examined. According to the nature of thesamples and the readings of the thermometer the position of the circularvalve 18 is conveniently adjusted.

The neck 27 is connected with the flanged neck 28 of the pipe-section fahollow hingejoint, which comprises a second short section of pipe 4,carrying a neck 29 and having its open end projecting into astuffing-box 31, formed at the end of the pipe section 3. Both shortpipe-sections 3 and 4 are closed at the outer ends, and they are heldtogether by a bolt 30 and nuts 32.

The neck 29 of the hollow hinge-joint 3 4 is connected with a pipe 5,running to the shell 6 of the bluing device, which is used when thecolor of yellowish products is to be improved. The bluing device, ofwhich Figs. 7 and S are detail views, essentially consists of an elbow33, cast in one piece, with the ultramarineholder 6 tightly closed bythe screwed cover 34, the middle portion of which is made up into astop-cock shell 35,round which the cover is dished out. The hollow plug36 of the stopcock can be turned by means of'the handle 37. It will bereadily understood that when the plug 36 is so adjusted that the slots38 or" the plug and the shell register ultramarine solution poured intothe dished-out cover 34 will flow into the holder 6. Below the bottom ofthe said ultramarine-holder 6 another stopcock shell 39 is formed, thehollow space of which communicates with the ultramarineholder throughthe short passage 40 and through a passage 41, bored in the rib of theside of the holder 6 and nearly extending to the top edge of the saidholder. In the same vertical plane with the short passage 40 thestop-cock shell 39 is pierced by ahole into which a short pipe 42 isinserted, the said pipe having its free end projecting into the elbow 33and bent downward so as to form a spout. In asimilar manner as the pipe42 corresponds to the short passage 40 a passage 43, also opening intothe elbow 33, corresponds to the long bore 41, and the plug 44 of thestop-cock is provided with two notches 45, by means of which thepassages 41 and 43, on the one hand, and 40 and 42, on the other hand,can be brought into communication at the same time, the plug 39 beingoperated by means of the handle 46. Through the passages 43 and 41 steamgets to the surface of the ultramarine solution in the holder 6 andcauses drops of the solution to fall down from the pipe 42, when thesedrops are carried along by the steam.

By means of the lower flange 47 the described bluing device rests on thetwo-parted lid 48 of the casing 11 of the centrifugal machine, and whenone-half. of this lid is removed the pipe 5 with the bluing device 6,the pipe 7, and the steam-spraying nozzle 8 may be swung upward, asindicated in dotted lines in Fig. 1, and free access got to thebasket'of the centrifugal machine for withdrawing the whitcned sugar.

Into the screw-threaded lower end of the elbow 33 screws the steam-pipe7, carrying the steam spraying nozzle 8. It forms a characteristicfeature of my invention that I so construct this nozzle as to enable itagain to wiredraw the steam, and thereby to make its dryness certain,although it may have been impaired by losses of caloric on the waythrough the pipe 5, bluing device 6, and pipe 7.

It will be seen from Figs. 9 and 10 that the free end of the nozzle hasa portion 49 of the valve-body and valve-seat.

That portion of the hollow valve-stem 50 which is located within thewidened portion 49 of the nozzle has apertures 51 cut through its sides.The steam passes through the apertures 51 into the annular space of Theportion49 and thence escapes through the narrow conical slot, whereby-itis wiredrawn anew.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In apparatus forintroducing steam into centrifugal machines forwhiteningsugar, the combination with the steam-spraying nozzle locatedin the basket of the centrifugal machine and the pipe supplying steamvto the said nozzle of an apparatus for drying and wiredrawing the steam,the saidapparatus being interposed into the supply-pipe of the nozzle,substantially as and for the purpose described.

2. In apparatus for introducing steam into centrifugal machines forwhitening sugar, the combination with the steam-spraying nozzle locatedin the basket of the centrifugal machine and the pipe supplying steam tothe said nozzle of an apparatus for drying and wiredrawing the steam,the said apparatus being interposed into the supply-pipe of the nozzle,and the nozzle being adapted to wiredraw the steam flowing-through it,substantially as and for the purpose described.

3. In apparatus for introducing steam into centrifugal machines forwhitening sugar, the combination with the centrifugal, the steamsprayingnozzle located in the'basket of the same, and the steam-supply pipe ofthe nozzle, of an annular chamber. provided with a helical partition andhaving the steam-supply pipe opening into its top, a pipe connectingpipe, and means for controlling the wire: drawing-valve by hand,substantially as and for the purpose described.

4. In apparatus for introducing steam into centrifugal machines forwhitening sugar, the combination with the centrifugal, the steamsprayingnozzle, and its steam-supply pipe of ahollow hinge-j oint interposedinto the steamsupply pipe, the portion of piping between the hinge-joint and the nozzle being elbow-shaped and the downwardly-extendin gbranch carrying a projection resting on the lid of the centrifugal,substantially as and for the purpose described.

5. In apparatus for introducing steam into centrifugal machines forwhitening sugar, the

combination-with the steam-supply pipe ofa cylindrical spout, awidenedend portion of the said spout, a conical valve-seat formed at the end ofthe said widened portion, a corresponding valve having its hollow stemscrewed into the spout, and steam-ports cut through the sides of thehollow valve-stem, substantially as and for the purpose described.

6. In apparatus forintroducing steam into.

centrifugal machines for whitening sugar, the, combination with thesteam-spraying nozzle and its steam-supply pipe of a closedultramarine-holder mounted upon the said pipe, a passage leading fromthe top portion of the inner space of the holder into the steam-pipe, asecond passage leading from the bottom portion of the holder into thesaid pipe, and a stop-cock adapted simultaneously to control bothpassages, substantially as and for the purpose described. 7. Inapparatus for introducing steam into centrifugal machines for whiteningsugar, the combination with the steam-spraying nozzle and itssteam-supply pipe of a closed ultras marine-holder mounted upon the saidpipe and having a dished-out cover, a stop-cockshell made integral withthe said cover, a plug inserted into the shell and adapted to beoperated by hand, a passage leading from the top portion of the holderinto the steam-pipe, a passage leading from the bottom portion ofthe'holder into the steam-pipe and means for controlling both passages,substantially as and for the purpose described.

In witness whereof I have signed this specification in presence of twowitnesses.

GUSTAV DENTSOH.

Witnesses VICTOR KERPL,

ALVESTO S. HOGUE.

It is hereby certified that the name of the patentee in LettersPatentNo. 744,503,

granted November 17, 1903, for an improvement in Apparatus forIntroducing Steam 7 into Centrifugal Machines, was erroneously writtenand printed Gustav Dentsch Whereas the said name should have beenWritten and printed Gustav Deutsch; andthat the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the ease in the Patent Office.

Signed and sealed this 9th da of February, A. 1)., 1904.

[SEAL] F. I. ALLEN,

Commissioner of Patents.

